A reversible conversion methodology: Between XML and object-relational models

XML is a standard for data exchanging between sites and heterogeneous applications. To exploit these data by database systems based on relational model, algorithms and methods of conversion have been developed. To do same with object-relational systems representing an extension of relational systems we propose in this paper a methodology to convert a XML schema respecting a DTD (Document Type Definition) into a schema of object-relational model. This methodology is reversible so that the result of conversion can be used to rebuild the initial XML schema.